Subtract 42/84 from 60/30
1st number: 2 0/30, 2nd number: 42/84
60/30 - 42/84 is 3/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 30 × 14 = 420,
60/30 = 60 × 14/30 × 14 = 840/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
42/84 = 42 × 5/84 × 5 = 210/420 - Subtract the two like fractions:
840/420 - 210/420 = 840 - 210/420 = 630/420 - After reducing the fraction, the answer is 3/2
- In mixed form: 11/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/90-42/84